support relative paths to application_url for declarative webhooks

[alexanderMontague]

WHY are these changes introduced?

Closes https://github.com/Shopify/develop-app-management/issues/1599

WHAT is this pull request doing?

• adds support for declarative webhook uris that are relative to the application_url
  ex:

application_url = "https://my-app-url.com"

[[webhooks.subscriptions]]
topics = ["products/create", "products/update"]
uri = "/products" # https://my-app-url.com/products

• this is especially useful when using app dev as the app url changes every time

• this also transforms the config on app config link, and we simplify like we do with the topics array
  ex. if you have

application_url = "https://my-app-url.com"

[[webhooks.subscriptions]]
topics = ["products/create"]
uri = "https://my-app-url.com/products"

[[webhooks.subscriptions]]
topics = ["orders/create"]
uri = "https://my-app-url.com/orders"

and link, we will simplify the config to

application_url = "https://my-app-url.com"

[[webhooks.subscriptions]]
topics = ["products/create"]
uri = "/products"

[[webhooks.subscriptions]]
topics = ["orders/create"]
uri = "/orders"

---

• There is also nothing stopping anyone from creating a bad relative path like

application_url = "https://my-app-url.com"

[[webhooks.subscriptions]]
topics = ["products/create"]
uri = "//////products" # https://my-app-url.com//////products

• As technically to https spec, this is still a valid URL. We could parse out extra forward slashes, but I think a developer would realize this once they see it in their TOML or on the dashboard
• The application_url cannot end in a forward slash so this protects against this on the app url side

How to test your changes?

• create an app and opt into the versioned config and declarative webhooks betas (both app and dev shop)
• create some webhook subscriptions with a relative path
• deploy the version
• go to the dashboard, you should see the full URL
• you can also link and make sure the toml does not change (unless it is this simplification case like mentioned)

Checklist

• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've considered possible documentation changes
• I've made sure that any changes to dev or deploy have been reflected in the internal flowchart.

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	73.92% (+0.04% 🔼)	6602/8931
🟡	Branches	70.7% (+0.09% 🔼)	3204/4532
🟡	Functions	73.42% (-0.01% 🔻)	1732/2359
🟡	Lines	74.94% (+0.04% 🔼)	6225/8307

Test suite run success

1584 tests passing in 738 suites.

Report generated by 🧪jest coverage report action from d3daf82

[github-actions]

We detected some changes at either packages/*/src or packages/cli-kit/assets/cli-ruby/** and there are no updates in the .changeset.
If the changes are user-facing, run "pnpm changeset add" to track your changes and include them in the next release CHANGELOG.

[gonzaloriestra]

The code LGTM, but I'm not sure about the approach as I commented here.

[gracejychang]

some minor comments, but otherwise everything looks good to me!

[gracejychang]

nit: should we check that application_url is what's to be expected as well?

[github-actions]

This PR seems inactive. If it's still relevant, please add a comment saying so. Otherwise, take no action.
→ If there's no activity within a week, then a bot will automatically close this.
Thanks for helping to improve Shopify's dev tooling and experience.

[alexanderMontague]

wip

[github-actions]

This PR seems inactive. If it's still relevant, please add a comment saying so. Otherwise, take no action.
→ If there's no activity within a week, then a bot will automatically close this.
Thanks for helping to improve Shopify's dev tooling and experience.

[alexanderMontague]

wip

[alexanderMontague]

#3948